Comfort.
Started with sport for the 'feel' and 'responsiveness' and all the other thesaruical terms found in car reviews...quickly realized it's mostly mental. Comfort isnt mushy or vague, it's just easier to steer. If I were on a track, yeah, I'd probably change out of comfort...but then again I wouldn't waste my time taking a pig of a model S out on track in the first place!
For reference, my daily commute starts with (or ends with...) four miles of twisty road and--mostly due to the fact that I'm very immature for my age--I drive like quite a knob...so it's not like I'm babying my baby.